We work as an agency model with multiple websites. Is there a way to have a parent website property that we can change globally and have all dependent website properties updated accordingly? How about at least global rules?
In case you are referring to a scenario as I've understood, I don't think it's possible. It may be possible to have an architecture as you defined (parent web property > child web property) but I doubt if the inheritance is supported.
I'll try to find more info but it'd be great if you could confirm if I'm understanding your query correctly.
Please help me understand your query a little better.
Are you trying to say that you wish to have a parent web property with some rules and data elements and when these are updated, the corresponding rules and data elements on the child web property should be updated respectively?